Best Chemical Acids of 2025

"I used it for my clogged toilet. After pouring 200ml, I waited 24 hours, and the clog was gone. It's a very useful item!"

"This acid is incredibly strong and needs full respect. I noticed acid vapors when I opened the cap. I intended to dissolve rocks, but they had a siliceous cement. However, it does dissolve limestone rapidly!"

"I ordered this product a second time and noticed some white powdery precipitate forming in the 15% HCl solution. Additionally, the packing material started to break down, leading to black suspensions in the fluid. Both issues are quite concerning."

"This stuff actually works! It cleaned my toilet, shower, and stained sinks effectively. Just a heads up, it makes my skin tingle, so I always wear gloves and safety glasses."

"I had stained stones in my water features, and this product worked quickly and effectively. I would definitely purchase it again!"

"After receiving a warning from my HOA about oil stains on my driveway, I was worried I'd have to replace the slabs. I bought a gallon of Certol, used a hard bristle brush, and successfully removed all stains. I sent pictures to the HOA and now there are no more warnings!"

"I found a recipe for making boric acid balls, and it was incredibly simple. I had a small roach issue, but it seems to have worked wonders since I haven't spotted any since! The roaches consume or carry the boric bait back to their colony, leading to their demise. I mixed it up easily and had plenty left over, which I stored in a tight baggie in the fridge. There’s no odor, but I wore a mask and gloves just in case. I'm truly satisfied!"

"I used just a pinch of this product in a bottle cap mixed with something sweet, and it completely eliminated a major ant problem. It was so effective!"

"After doing some research, I decided to create my own boric acid suppositories using this product. I load the boric acid into 00 sized pharmaceutical-grade gelatin capsules. They have been effective in helping maintain a balanced pH and addressing chronic yeast infections. I highly recommend using this alongside PB8 probiotics for a powerful one-two punch. Just a heads up: you might want to wear a cotton panty-liner during use since the powder will eventually come out as discharge. Overall, it's a trustworthy product for feminine hygiene, and I give it a solid 5 out of 5 for value and performance!"

"I find the Essencea Citric Acid to be an excellent product for many applications. Its fine texture dissolves easily, making it perfect for cooking, cleaning, and even bath bombs. The bulk size is a major plus for my needs!"

"I appreciate the timely delivery and the affordable pricing of this citric acid. I use it with salt to clean valuable rocks without damaging them. It passed my taste test—pure and clean!"

"Using citric acid in my water distiller has been a game changer. I add a tablespoon directly to the water, and it helps prevent residue buildup. It's very cost-effective since I can reuse it multiple times!"

"I use this for homemade salsa and had to reduce the amount from 1 tsp to 1/2 tsp. It's great for canning and cleaning stainless steel. This works much better than my previous citric acid. I will definitely buy this one again."

"I was thrilled to find this product for cleaning! It removed calcium buildup in my toilets overnight. I also used it on faucets, and it works better than commercial removers, plus it's much cheaper. Just a tip - wear rubber gloves as it can irritate your hands."

"This Citric Acid is a fantastic deal! I needed a lot for making bath bombs for Christmas gifts, and it worked perfectly. I was surprised at how expensive citric acid can be, so finding this was a real win. The fizzy effect turned out just as I wanted!"

“I use this to clean my water distiller and it works great on internal stains in my toilet bowl tank! It's safe and effective!”

“My dishwasher repair person recommended this ascorbic acid powder for our hard water issues. It's chemical-free and my dishes come out sparkling clean!”

“I was skeptical about its ability to remove stubborn rust and hard water stains, but after applying it with hot water, I was amazed! Most of the stains in my old toilet are GONE.”

“As a middle school teacher, I needed this for science class, and it worked well for my needs.”

“I attempted to dissolve 25 grams of copper with at least 400ml of this product, but it barely dissolves anything; it just cleans the surface. I suggest buying concentrated acid elsewhere for about the same price.”

“I required this for a reagent in titration to determine the dKH for my saltwater reef tank. While it's already diluted, it provides a known concentration of acid, which is essential for my calculations. I was able to dilute it easily to achieve a 0.01N acid, and my tests yielded consistent results.”

"I found the smell quite strong, but it works well. However, I feel like the amount is a bit small for the price I paid."

"This product is great for cleaning my grout and managing the PH levels in my extremely hard well water, which is around 8-9."

"At times, I think it feels a bit too diluted, but I use it for cleaning my marine sediment fossils and it does the job."

"I purchased this product for vaginal health and it has worked wonders! I was nervous trying something new, but the quality was excellent!"

"I used this to tackle fleas in my house, and it worked really fast! My only regret is that I should have ordered a larger size. I managed to cover one room, but I’ll be buying more for sure!"

"After struggling with cockroaches despite hiring exterminators, I finally tried this product. I mixed it with sugar and placed it all over my kitchen. It seemed like the roaches increased at first, but by week three, they were gone! Very effective!"

“I have what feels like a lifetime supply of HCl for my copper plating needs, as I only require ONE DROP per batch. It's effective, so the listing is spot on, and the seller is doing a great job.”

“There was a minor issue with shipping, but I found Stellar Chem. Corp. to be incredibly helpful and quick in resolving it. I highly recommend them; their products are just as described.”

“The purity and quality of this HCl is exceptional; however, the container design isn’t ideal and causes some leaking and corrosion. I’d suggest transferring it to a more suitable bottle.”